hash_table_datastruct 0.6.3

Adds a HashTable type, allowing to store values in a table with integer-indexed rows and hashable keys for columns
Documentation 
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//! Borrowed column access

use std::ops::Deref;

/// Borrowed view into a table's column
#[derive(Debug)]
pub struct HashTableColumnBorrowed<'t, 'k, Q, V> {
    pub(crate) column: &'k Q,
    pub(crate) values: Vec<&'t V>,
}

impl<Q, V> Clone for HashTableColumnBorrowed<'_, '_, Q, V> {
    fn clone(&self) -> Self {
        Self {
            column: self.column,
            values: self.values.clone(),
        }
    }
}

impl<'t, 'k, Q, V> HashTableColumnBorrowed<'t, 'k, Q, V> {
    /// Get the key of the table column
    pub fn column_key(&self) -> &'k Q {
        self.column
    }
}

impl<'t, Q, V> Deref for HashTableColumnBorrowed<'t, '_, Q, V> {
    type Target = Vec<&'t V>;

    /// This [`Deref`] implementation allows using this column as a regular [`Vec`]
    fn deref(&self) -> &Self::Target {
        &self.values
    }
}

impl<'t, Q, V> IntoIterator for HashTableColumnBorrowed<'t, '_, Q, V> {
    type Item = &'t V;
    type IntoIter = <Vec<&'t V> as IntoIterator>::IntoIter;

    /// An iterator over borrowed values of a table column.
    fn into_iter(self) -> Self::IntoIter {
        self.values.into_iter()
    }
}